Aiming at the problems of missed detection and false detection of small target defects on the surface of aluminum profiles, an improved Faster R-CNN deep learning network is proposed to detect paint bubbles and dirty spots. Firstly, create a small target data set for these two types of defects, redesigning the anchor ratio, and then use ROI-Align instead of ROI-Pooling to obtain more accurate defects location information, and finally use Soft-NMS algorithm to replace NMS Algorithm to eliminate redundant prediction frames, which improves the detection accuracy of small target defects. The experiment shows that the improved network has an AP value of 64.06% for paint bubbles defects, which is 12.99 % higher than the original Faster R-CNN network, and the AP value of dirty spots defects is up to 82.98%, which is 6.59% higher than the original Faster R-CNN network.
{"title":"Improved Method Based on Faster R-CNN Network Optimization for Small Target Surface Defects Detection of Aluminum Profile","authors":"Yanxi Yang, Qiao Sun, Dongkun Zhang, Linchang Shao, Xingkun Song, Xinyu Li","doi":"10.1109/ICEMI52946.2021.9679509","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679509","url":null,"abstract":"Aiming at the problems of missed detection and false detection of small target defects on the surface of aluminum profiles, an improved Faster R-CNN deep learning network is proposed to detect paint bubbles and dirty spots. Firstly, create a small target data set for these two types of defects, redesigning the anchor ratio, and then use ROI-Align instead of ROI-Pooling to obtain more accurate defects location information, and finally use Soft-NMS algorithm to replace NMS Algorithm to eliminate redundant prediction frames, which improves the detection accuracy of small target defects. The experiment shows that the improved network has an AP value of 64.06% for paint bubbles defects, which is 12.99 % higher than the original Faster R-CNN network, and the AP value of dirty spots defects is up to 82.98%, which is 6.59% higher than the original Faster R-CNN network.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121310028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679617
Yao Li, Yutong Ma, Xiyuan Peng
As the satellite operates in orbit, it is affected by the space environment, and it is difficult to always ensure its normal operation. Through the satellite in-orbit test, the satellite's in-orbit operating status can be monitored, so that the satellite can be managed and remotely controlled to ensure the normal operation in time. This work describes a general-purpose intelligent spaceborne test unit for satellite integrated electronic systems. The designed unit is divided into three parts that are data acquisition unit, information processing unit and data storage unit. The data acquisition unit has multiple communication interfaces which are used to collect state data on the satellite, and the information processing unit runs the fault prediction algorithms to monitor and predict the state of the satellite, and deliver the results and the important state parameters into the data storage unit. After experimental verification, the intelligent spaceborne test unit has communication interfaces commonly used on satellites, and has the ability to collect satellite status data. It can also accelerate the execution of LSTM fault prediction algorithms and quickly store the analysis results. The intelligent test unit is efficient and reliable, which supports rapid extended development on this platform. It is capable of carrying out satellite fault monitoring and can be used for the on-board health management system in future.
{"title":"Design and Implementation of Intelligent Spaceborne Test Unit","authors":"Yao Li, Yutong Ma, Xiyuan Peng","doi":"10.1109/ICEMI52946.2021.9679617","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679617","url":null,"abstract":"As the satellite operates in orbit, it is affected by the space environment, and it is difficult to always ensure its normal operation. Through the satellite in-orbit test, the satellite's in-orbit operating status can be monitored, so that the satellite can be managed and remotely controlled to ensure the normal operation in time. This work describes a general-purpose intelligent spaceborne test unit for satellite integrated electronic systems. The designed unit is divided into three parts that are data acquisition unit, information processing unit and data storage unit. The data acquisition unit has multiple communication interfaces which are used to collect state data on the satellite, and the information processing unit runs the fault prediction algorithms to monitor and predict the state of the satellite, and deliver the results and the important state parameters into the data storage unit. After experimental verification, the intelligent spaceborne test unit has communication interfaces commonly used on satellites, and has the ability to collect satellite status data. It can also accelerate the execution of LSTM fault prediction algorithms and quickly store the analysis results. The intelligent test unit is efficient and reliable, which supports rapid extended development on this platform. It is capable of carrying out satellite fault monitoring and can be used for the on-board health management system in future.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129193324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679587
Ming Yan, Congru Yin, Yue He, Tiantian Li
The conductive ring dynamic contact resistance tester is a necessary instrument and equipment in many fields, such as national defense and military industry. Based on the research of the working principle and measurement characteristics of the conductive ring dynamic contact resistance tester, this paper proposed that the calibration parameters are incomplete when the DC resistance box is used for calibration. In response to this problem, this paper proposed a time-varying resistance standard as a calibration source. The calibration source is controlled by the timing module. The constant current active adjustable resistance generation module outputs the resistance at a timing. The resistance change rate is 10ksa/s and the resistance output range is from 10mΩ to 100Ω. It can realize the full parameter calibration of resistance parameters and sampling rate parameters of the conductive ring dynamic contact resistance tester, ensuring the quality control of this kind of equipment.
{"title":"Development of Calibration Source for Dynamic Contact Resistance Tester of Conductive Ring Based on Time-Varying Resistance","authors":"Ming Yan, Congru Yin, Yue He, Tiantian Li","doi":"10.1109/ICEMI52946.2021.9679587","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679587","url":null,"abstract":"The conductive ring dynamic contact resistance tester is a necessary instrument and equipment in many fields, such as national defense and military industry. Based on the research of the working principle and measurement characteristics of the conductive ring dynamic contact resistance tester, this paper proposed that the calibration parameters are incomplete when the DC resistance box is used for calibration. In response to this problem, this paper proposed a time-varying resistance standard as a calibration source. The calibration source is controlled by the timing module. The constant current active adjustable resistance generation module outputs the resistance at a timing. The resistance change rate is 10ksa/s and the resistance output range is from 10mΩ to 100Ω. It can realize the full parameter calibration of resistance parameters and sampling rate parameters of the conductive ring dynamic contact resistance tester, ensuring the quality control of this kind of equipment.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128408751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679661
Rongrui Zhang, Heng Zhao, Zixuan Liu, Kun Li, Luoren Shi, Jiaqi Li
The mass concentration of fine particles is often used as an important numerical index to evaluate regional ambient air quality. Compared with other measurement methods, light scattering method has many advantages, such as fast measurement speed, high precision, good repeatability, online and real-time non-contact measurement. Optical particle counter (OPC) can have better detection performance than other detection angles at a particular detection angle. The ideal OPC can not only detect particles without being affected by environmental changes, but also can invert the particle size value accurately. A simpler solution is to fuse the detection results of the forward and lateral photoelectric sensors to obtain a particle concentration value that is better than any single sensor. In this paper, a data fusion method is proposed which does not depend on the reliability of individual sensors, but generates optimal weight coefficients driven by empirical data. Field comparative experiments verify the effectiveness of this new dual-angle OPC fusion scheme. It has strong robustness in practical applications and can improve the performance of the sensor based on overcoming a variety of environmental disturbances.
{"title":"Forward and Lateral Dual-Angle Optical Particle Counter Data Fusion to Detect Particle Mass Concentration","authors":"Rongrui Zhang, Heng Zhao, Zixuan Liu, Kun Li, Luoren Shi, Jiaqi Li","doi":"10.1109/ICEMI52946.2021.9679661","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679661","url":null,"abstract":"The mass concentration of fine particles is often used as an important numerical index to evaluate regional ambient air quality. Compared with other measurement methods, light scattering method has many advantages, such as fast measurement speed, high precision, good repeatability, online and real-time non-contact measurement. Optical particle counter (OPC) can have better detection performance than other detection angles at a particular detection angle. The ideal OPC can not only detect particles without being affected by environmental changes, but also can invert the particle size value accurately. A simpler solution is to fuse the detection results of the forward and lateral photoelectric sensors to obtain a particle concentration value that is better than any single sensor. In this paper, a data fusion method is proposed which does not depend on the reliability of individual sensors, but generates optimal weight coefficients driven by empirical data. Field comparative experiments verify the effectiveness of this new dual-angle OPC fusion scheme. It has strong robustness in practical applications and can improve the performance of the sensor based on overcoming a variety of environmental disturbances.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117110528","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679604
Wanpei Chen, Qinrong Yang, Sheng Gao, Hengchao Han
With the rapid development of Internet of Things technology, it is increasingly widely used in various industries. In the normal operation of the power system, transmission lines often have low carrying current capacity due to high wind level, abnormal ambient temperature and other reasons, resulting in a large area of power shortage in the peak period of power consumption and the loss of power resources in the trough period. In view of the above problems, using the dynamic capacity increasing technology, on the basis of theoretical analysis, according to the ambient temperature, wind speed, light intensity and other parameters of the maximum line current carrying capacity simulation analysis, get the load under different conditions, to achieve the dynamic change of the maximum line current carrying capacity. The experimental results show that the dynamic capacity augmentation technology can change the conductor capacity in real time and effectively alleviate the problems of power shortage and resource loss, which has a wide application prospect.
{"title":"Dynamic Capacity Enhancement Technology and Application in Electric Internet of Things","authors":"Wanpei Chen, Qinrong Yang, Sheng Gao, Hengchao Han","doi":"10.1109/ICEMI52946.2021.9679604","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679604","url":null,"abstract":"With the rapid development of Internet of Things technology, it is increasingly widely used in various industries. In the normal operation of the power system, transmission lines often have low carrying current capacity due to high wind level, abnormal ambient temperature and other reasons, resulting in a large area of power shortage in the peak period of power consumption and the loss of power resources in the trough period. In view of the above problems, using the dynamic capacity increasing technology, on the basis of theoretical analysis, according to the ambient temperature, wind speed, light intensity and other parameters of the maximum line current carrying capacity simulation analysis, get the load under different conditions, to achieve the dynamic change of the maximum line current carrying capacity. The experimental results show that the dynamic capacity augmentation technology can change the conductor capacity in real time and effectively alleviate the problems of power shortage and resource loss, which has a wide application prospect.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115449298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679560
Liren Zhou, L. Zhu, Ji Geng, Qin Yi, Pan Yang
In virtue of modern control theory, combining with the analysis of structure and principle of direct current comparator (DCC), relative error formula of direct current ratio was derived to theoretically analyze the steady state value. Resolve each part of transfer function and then compound the closed-loop transfer function. Employ Nyquist stability criterion to judge the system stability; establish the closed-loop transfer characteristic simulation model; take unit ampere turn value as example and the simulation result was analyzed. The results showed that the secondary side fast tracked the primary side signal and output signal smoothly, without obvious transition appearance such as overshoot and oscillation, according with the principle of DCC. The steady-state error of direct current ratio is 2.5×10−8, consisting with the derived theoretical value, meeting the expected design requirements.
{"title":"Research on the Theoretical Steady-State Error of Direct Current Comparator","authors":"Liren Zhou, L. Zhu, Ji Geng, Qin Yi, Pan Yang","doi":"10.1109/ICEMI52946.2021.9679560","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679560","url":null,"abstract":"In virtue of modern control theory, combining with the analysis of structure and principle of direct current comparator (DCC), relative error formula of direct current ratio was derived to theoretically analyze the steady state value. Resolve each part of transfer function and then compound the closed-loop transfer function. Employ Nyquist stability criterion to judge the system stability; establish the closed-loop transfer characteristic simulation model; take unit ampere turn value as example and the simulation result was analyzed. The results showed that the secondary side fast tracked the primary side signal and output signal smoothly, without obvious transition appearance such as overshoot and oscillation, according with the principle of DCC. The steady-state error of direct current ratio is 2.5×10−8, consisting with the derived theoretical value, meeting the expected design requirements.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114294587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679518
Tongzhi Yang, Jiancheng Dang, Xianjun Cai, Tingyu Liu, Sen Wang, Chong Wang
With the rapid development of commercial communication constellation satellites, the traditional ground operation monitoring mode has been unable to meet the needs of thousands of on orbit spacecraft operation management. It is necessary to improve the spacecraft autonomous maintenance ability and reduce the business volume and complexity of ground management. Civil aviation greatly improves the autonomous Airworthiness of aircraft through the on-board maintenance system based on self-test. Referring to the on-board maintenance system technology of civil aviation and combined with the characteristics of spacecraft development, the layered and automatic spacecraft maintenance system architecture is designed, which can support the maintenance based on self-test at system level, single machine level and board level. When the self-test result is abnormal, the spacecraft maintenance system handles exceptions according to the plan, seeks to access the ground station and jointly complete the on orbit operation and maintenance guidance of spacecraft cluster with the ground.
{"title":"Research on Spacecraft Maintenance System Technology for Autonomous Management","authors":"Tongzhi Yang, Jiancheng Dang, Xianjun Cai, Tingyu Liu, Sen Wang, Chong Wang","doi":"10.1109/ICEMI52946.2021.9679518","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679518","url":null,"abstract":"With the rapid development of commercial communication constellation satellites, the traditional ground operation monitoring mode has been unable to meet the needs of thousands of on orbit spacecraft operation management. It is necessary to improve the spacecraft autonomous maintenance ability and reduce the business volume and complexity of ground management. Civil aviation greatly improves the autonomous Airworthiness of aircraft through the on-board maintenance system based on self-test. Referring to the on-board maintenance system technology of civil aviation and combined with the characteristics of spacecraft development, the layered and automatic spacecraft maintenance system architecture is designed, which can support the maintenance based on self-test at system level, single machine level and board level. When the self-test result is abnormal, the spacecraft maintenance system handles exceptions according to the plan, seeks to access the ground station and jointly complete the on orbit operation and maintenance guidance of spacecraft cluster with the ground.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"35 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114110121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679648
Pei Li, Yu Liu, Xingsong Deng, Baodong Wu, Rong Fu
Cooperative electronic jamming has been one of the key countermeasures in modern and even future electronic warfare in recent years' researches. In consideration of the limited effectiveness and lack of intelligence on traditional cooperative electronic jamming, the technology of self-organized cooperative electronic jamming by unmanned aerial vehicle (UAV) swarm is researched. The intelligent cooperative jamming system is established on the basis of the mechanism of self-organized cooperation. To realize the reasonable assignment of sub-jammer members in this UAV swarm system, the jamming strategy for self-organized cooperation based on the algorithm of contribution priority and cost competition is proposed. The optimal assignment is achieved by determination of team group members within the operational sub-jammers according to the maximum contribution and minimum cost for all tasks. The simulation result shows that the proposed algorithm of contribution priority and cost competition performs well in the cooperative electronic jamming strategy, which is valuable for its application in real electronic combat environment.
{"title":"Self-organized Cooperative Electronic Jamming by UAV Swarm Based on Contribution Priority and Cost Competition","authors":"Pei Li, Yu Liu, Xingsong Deng, Baodong Wu, Rong Fu","doi":"10.1109/ICEMI52946.2021.9679648","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679648","url":null,"abstract":"Cooperative electronic jamming has been one of the key countermeasures in modern and even future electronic warfare in recent years' researches. In consideration of the limited effectiveness and lack of intelligence on traditional cooperative electronic jamming, the technology of self-organized cooperative electronic jamming by unmanned aerial vehicle (UAV) swarm is researched. The intelligent cooperative jamming system is established on the basis of the mechanism of self-organized cooperation. To realize the reasonable assignment of sub-jammer members in this UAV swarm system, the jamming strategy for self-organized cooperation based on the algorithm of contribution priority and cost competition is proposed. The optimal assignment is achieved by determination of team group members within the operational sub-jammers according to the maximum contribution and minimum cost for all tasks. The simulation result shows that the proposed algorithm of contribution priority and cost competition performs well in the cooperative electronic jamming strategy, which is valuable for its application in real electronic combat environment.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114890370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679494
Jinzhao She, Jianyun Chen, Zhi Qu
Based on Ethernet, time-sensitive networking (TSN) provides end-to-end data transmission with extremely low delay and high reliability. It is suitable for latency-sensitive applications and is widely used in autonomous driving, industrial Internet and other scenarios. This paper proposes a wireless TSN based on distributed synchronization, which can not only be used in real-time applications, but also be extended to satellite cluster networking applications. Firstly, this paper briefly introduces the main characteristics and application scenarios of TSN, and focuses on the time synchronization mechanism of wireless TSN. Then, a distributed clock synchronization algorithm suitable for wireless TSN is proposed and simulated. The results show that the algorithm can achieve sub-nanosecond time synchronization in 16 nodes wireless TSN, and the convergence time is seconds. At the end of the paper, the time synchronization performance of wireless TSN is compared when the number of network nodes and topology structures are different.
{"title":"Wireless Time-Sensitive Networking Based on Distributed Clock Synchronization","authors":"Jinzhao She, Jianyun Chen, Zhi Qu","doi":"10.1109/ICEMI52946.2021.9679494","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679494","url":null,"abstract":"Based on Ethernet, time-sensitive networking (TSN) provides end-to-end data transmission with extremely low delay and high reliability. It is suitable for latency-sensitive applications and is widely used in autonomous driving, industrial Internet and other scenarios. This paper proposes a wireless TSN based on distributed synchronization, which can not only be used in real-time applications, but also be extended to satellite cluster networking applications. Firstly, this paper briefly introduces the main characteristics and application scenarios of TSN, and focuses on the time synchronization mechanism of wireless TSN. Then, a distributed clock synchronization algorithm suitable for wireless TSN is proposed and simulated. The results show that the algorithm can achieve sub-nanosecond time synchronization in 16 nodes wireless TSN, and the convergence time is seconds. At the end of the paper, the time synchronization performance of wireless TSN is compared when the number of network nodes and topology structures are different.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127447723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-10-29DOI: 10.1109/ICEMI52946.2021.9679586
Suhang Li, Yang Zhang, Tingting Lin
Surface nuclear magnetic resonance (SNMR) technology is widely used in the detection of groundwater. To obtain the large transmission power (450 V, 450 A), SNMR instrument uses large-capacity and high-voltage capacitor as the energy source. Traditional SNMR charging method has a slow speed and low accuracy, which is unfavorable for the efficiency and effectiveness of detection. To solve this problem, we propose a high-accuracy and fast charging method based on a two-stage charging strategy with constant current (CC) first and constant voltage (CV) later. The charging strategy includes a switching rule for smoothly switching between the two stages, and two Proportion Integral (PI) controllers for fast and stable constant current output and constant voltage output respectively. To further speed up the charging process, we propose a multi-channel parallel charging strategy. During the CV process, an average current strategy is applied to ensure automatic current sharing. Theoretical analysis and simulation experiments were conducted to verify the effectiveness of the new method. The simulation results showed that the new method is superior to the traditional method in both charging speed and charging accuracy. Finally, we propose an instrument structure of the transmitter with the proposed charging strategy. The new charging method provides a technical support for ameliorating the charging process of SNMR system.
{"title":"High-Accuracy and Fast Charging Method Based on Multi-Channel Two-Stage Charging Strategy for Surface Nuclear Magnetic Resonance","authors":"Suhang Li, Yang Zhang, Tingting Lin","doi":"10.1109/ICEMI52946.2021.9679586","DOIUrl":"https://doi.org/10.1109/ICEMI52946.2021.9679586","url":null,"abstract":"Surface nuclear magnetic resonance (SNMR) technology is widely used in the detection of groundwater. To obtain the large transmission power (450 V, 450 A), SNMR instrument uses large-capacity and high-voltage capacitor as the energy source. Traditional SNMR charging method has a slow speed and low accuracy, which is unfavorable for the efficiency and effectiveness of detection. To solve this problem, we propose a high-accuracy and fast charging method based on a two-stage charging strategy with constant current (CC) first and constant voltage (CV) later. The charging strategy includes a switching rule for smoothly switching between the two stages, and two Proportion Integral (PI) controllers for fast and stable constant current output and constant voltage output respectively. To further speed up the charging process, we propose a multi-channel parallel charging strategy. During the CV process, an average current strategy is applied to ensure automatic current sharing. Theoretical analysis and simulation experiments were conducted to verify the effectiveness of the new method. The simulation results showed that the new method is superior to the traditional method in both charging speed and charging accuracy. Finally, we propose an instrument structure of the transmitter with the proposed charging strategy. The new charging method provides a technical support for ameliorating the charging process of SNMR system.","PeriodicalId":289132,"journal":{"name":"2021 IEEE 15th International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123619728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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